1. Points, Lines, and Planes
Lesson 1
Points, Lines, and Planes

2. Warm Up:
Solve each equation for the variable: 2)

3. Warm Up Answers: Solve each equation for the variable: 2) +7 +7 -2 -2
4 * 4 = a / 4 * 4
16 = a
9x = 0
x = 0

4. Vocabulary
Undefined term - a basic mathematical term that is not defined using other mathematical terms.
Point - a location, labeled using a capital letter.
Line - a straight path that has no thickness and extends forever.
Collinear points - points that lie on the same line.
Noncollinear points - points that do not lie on the same line.

5. Vocabulary
Plane - a flat surface that has no thickness and extends forever, a plane is names using either an uppercase letter or three noncollinear points that lie on the plane.
Coplanar - lines or points that are in the same plane.
Noncoplanar - lines or points that do not lie in the same plane.
Intersection - the point or set of points in which two figures meet.
when two lines intersect, their intersection is a single point.
when two planes intersect, their intersection is a line.
if two lines or planes are parallel, they will never intersect

7. Lesson practice - example 1

9. Lesson practice - example 2

11. Lesson practice - example 3

13. Lesson Practice - example 4